Big Horn County Wyoming (Historic Districts) has 4 places on the National Register of Historic Places including 3 places of Statewide significance. Significant places include Black Mountain Archeological District (48BH900/902/1064/106 7/1126/1127/1128/1129), Black Mountain Archeological District (Boundary Increase) and Paint Rock Canyon Archeological Landscape District, Big Horn Academy Historic District.
Prehistoric cultural affiliation(s) include Archaic, Paleoindian, Late Prehistoric, Middle Plains Archaic and Protohistoric dating back to 8999 BC.
Some of the country's most noteable architects helped create the Big Horn County places including Works Progress Administration. Prominent architectural styles found in Big Horn Country are Romanesque.